On the wives' jobs:
Janelle said in Season 1 that she worked many hours and made contributions for the household. Meri said she "had a great job" but lost it after the show came out. Christine never worked -- she took charge of taking all the children to school, cooking dinners, etc. while the other wives worked. Christine wants to be Kody's barefoot and pregnant one, hence the reason why she has her panties in a bunch over Robyn's pregnancy. I think Christine keeps getting pregnant to gain more attention from Kody. As for Robyn's job, who knows...wasn't she living off child support from her children's father?